Quarter	Percent, Seasonally Adjusted
1999-01-01	49.2599405128776
1999-04-01	49.4205008193023
1999-07-01	49.5200068834820
1999-10-01	49.5661218666406
2000-01-01	49.5152577589054
2000-04-01	49.6745750924733
2000-07-01	49.7970517430338
2000-10-01	50.0775339619486
2001-01-01	49.3108578184091
2001-04-01	48.9759822234631
2001-07-01	48.9952639813580
2001-10-01	48.7533597555311
2002-01-01	48.9168245625641
2002-04-01	49.0064420799927
2002-07-01	49.0885036434391
2002-10-01	49.2523612432962
2003-01-01	49.4875191452168
2003-04-01	49.8199330063108
2003-07-01	49.8664638306527
2003-10-01	49.8797240158853
2004-01-01	49.8103920662985
2004-04-01	49.5712684288658
2004-07-01	49.5221043391689
2004-10-01	49.7704336960388
2005-01-01	49.9889144001987
2005-04-01	50.0958835509880
2005-07-01	50.2949693342441
2005-10-01	50.3074507970687
2006-01-01	50.5741190041426
2006-04-01	50.6837020186858
2006-07-01	50.5966395458724
2006-10-01	50.7638746775083
2007-01-01	50.5357018356802
2007-04-01	50.3575456036649
2007-07-01	50.2321952213445
2007-10-01	50.1687944895606
2008-01-01	49.8542041837656
2008-04-01	49.7541729240174
2008-07-01	50.0839039368759
2008-10-01	49.9432832525314
2009-01-01	49.8181476031837
2009-04-01	49.8727508481405
2009-07-01	49.7358400603650
2009-10-01	49.9946873673426
2010-01-01	50.2709395565755
2010-04-01	50.3407495093493
2010-07-01	50.3933112686519
2010-10-01	50.3692902674273
2011-01-01	50.3948046794760
2011-04-01	50.6162249474868
2011-07-01	50.7421939679180
2011-10-01	50.9554701722687
2012-01-01	51.2023955482575
2012-04-01	51.5963966241815
2012-07-01	51.8709372353630
2012-10-01	51.9708254951372
2013-01-01	51.5982484585096
2013-04-01	52.1221154529938
2013-07-01	52.3349352288441
2013-10-01	52.6662138334269
2014-01-01	53.4164541823462
2014-04-01	53.5395566433880
2014-07-01	53.8165528075292
2014-10-01	53.9532723908338
2015-01-01	54.3772150336801
2015-04-01	54.6663762770026
2015-07-01	54.9269688118821
2015-10-01	55.0594018239613
2016-01-01	55.3721635579056
2016-04-01	55.5748577995742
2016-07-01	55.7711872049963
2016-10-01	56.0646922253517
2017-01-01	55.9862115227949
2017-04-01	56.2888498842846
2017-07-01	56.3604325424260
2017-10-01	56.4628657065271
2018-01-01	56.6802371132328
2018-04-01	56.6924516255103